Randy Vickers, a neighbor, described the blast as "the loudest explosion I've ever heard."

Ida Neal, Luttrell's mother, was still hospitalized with injuries from the explosion as of Monday night.

Hardwig said Neal was still grieving after the death of her younger song to cancer last November.

"He would bring sunshine to your day. He'd come into a room and room it fill up with Dwayne," Hardwig said.

Duke Energy and the Newport Fire Department is still investigating the explosion but they said there is no evidence of suspicious activity.

"We ruled out criminal activity in our findings. It is consistent with natural gas. Again, we can't figure out what caused actual explosion -- it could be any number of things," Capt. Gary Auffart said.

The captain said Luttrell was on the first floor of the house and his mother and stepfather were asleep on the second floor.

"If you do smell gas and can't find the source, definitely exit the building somewhere safe and call 911. Don't turn a light switch on or off and remember (to use) a flashlight -- matches, almost anything can be ignition source," Auffart said.

Neal and her husband, Paul, lost everything in the explosion.

Hardwig said a fund is being set up through Fifth Third Bank to help pay for the costs of Luttrell's funeral.

Forty years ago, one of the greatest boxing matches in history took place in an unlikely setting: the capital of the Philippines. Muhammad Ali's epic win over great rival Joe Frazier in 1975 became known as the "Thrilla in Manila."